Finding the Fourth Proportional to 196,839.62, 294,815.52 and 91,436.78

Step by Step Solution

1. Step 1: Write the proportion equation
   196,839.62 : 294,815.52 = 91,436.78 : x
2. Step 2: Convert to fraction form
   196,839.62/294,815.52 = 91,436.78/x
3. Step 3: Cross multiply
   196,839.62x = 294,815.52 × 91,436.78
4. Step 4: Simplify right side
   196,839.62x = 26,956,981,842.83
5. Step 5: Solve for x
   x = 26,956,981,842.83/196,839.62
6. Step 6: Final answer
   x = 136,948.96